//
//  API.swift
//  Duckable
//
//  Created by Shadowfacts on 11/7/22.
//

import UIKit

@MainActor
public protocol DuckableViewController: UIViewController {
    func duckableViewControllerShouldDuck() -> DuckAttemptAction
    
    func duckableViewControllerMayAttemptToDuck()
    
    func duckableViewControllerWillAnimateDuck(withDuration duration: CGFloat, afterDelay delay: CGFloat)
    
    func duckableViewControllerDidFinishAnimatingDuck()
}

extension DuckableViewController {
    public func duckableViewControllerShouldDuck() -> DuckAttemptAction { .duck }
    public func duckableViewControllerMayAttemptToDuck() {}
    public func duckableViewControllerWillAnimateDuck(withDuration duration: CGFloat, afterDelay delay: CGFloat) {}
    public func duckableViewControllerDidFinishAnimatingDuck() {}
}

public enum DuckAttemptAction {
    case duck
    case dismiss
    case block
}

extension UIViewController {
    @available(iOS 16.0, *)
    public func presentDuckable(_ viewController: DuckableViewController, animated: Bool, isDucked: Bool = false) -> Bool {
        var cur: UIViewController? = self
        while let vc = cur {
            if let container = vc as? DuckableContainerViewController {
                container.presentDuckable(viewController, animated: animated, isDucked: isDucked, completion: nil)
                return true
            } else {
                cur = vc.parent
            }
        }
        return false
    }
}